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Author Topic:   1/4 mile dirt track gears
yakesservice
Dirt Roller

Total posts: 23
posted November 28, 2001 09:39 AM
I need help to determine what gears to run.
81 Monte Carlo w/ power glide,stock 7.5 rear end.Will be running on a 1/4 mile dirt track.
I'm new to the sport,any help is appreciated!! Also any other suggestions.

racer17j
Dirt Forum Champ
Total posts: 1565
posted November 28, 2001 10:30 AM UIN: 54865418
here is a formula to help you
you are going to need to messure the roll of your tire do this by running a tape around the tallest part of the tire then deviding that by 3.14 you will also need an idea on what rpm you want to run and what speeds they hit at the track you run at

tire roll x red line rpm
--------------------------------------
336 x mph max speed
that will give you the final gear you need to run do you know witch 1st gear your tranny has is it 1.82 or 1.76?


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